public DataServiceController(IContractsRepository cntrcRep,
									 ITradersRepository trdrRep,
									 IOrdersRepository ordRep,
									 IInvoicesRepository invRep,
									 IItemsRepository itmRep,
									 IAirportsRepository airRep,
									 IAircraftsRepository acrRep,
                                     ICurrenciesRepository curRep)
        {
            _contractsRepository = cntrcRep;
            _tradersRepository = trdrRep;
            _ordersRepository = ordRep;
            _invoicesRepository = invRep;
            _itemsRepository = itmRep;
            _airportsRepository = airRep;
            _aircraftsRepository = acrRep;
            _currenciesRepository = curRep;
        }
        public void PrepareRepositories(bool initialize = false)
        {
            // Kick the model creation process if not already created (hence force is false). In other words, do
            // not wait on any database activities. Without this, nothing happens unless some context activities take
            // place.
            _context = new AviTradeContext();
            if (initialize)
            {
                // Kick the model creation process if not already created (hence force is false). In other words, do
                // not wait on any database activities. Without this, nothing happens unless some context activities take
                // place.
                _context.Database.Initialize(force: false);
            }

            _contractsRepository = new ContractsRepository(_context);
            _airportsRepository = new AirportsRepository(_context);
            _aircraftsRepository = new AircraftsRepository(_context);
            _itemsRepository = new ItemsRepository(_context);
            _currenciesRepository = new CurrenciesRepository(_context);
            _periodsRepository = new PeriodsRepository(_context);
            _invoicesRepository = new InvoicesRepository(_context, _periodsRepository);
            _ordersRepository = new OrdersRepository(_context, _contractsRepository, _airportsRepository,
                                                     _aircraftsRepository, _itemsRepository, _currenciesRepository,
                                                     _invoicesRepository);
            _tradersRepository = new TradersRepository(_context);
        }